Fuse-block clip.



R. G. COLE.

FUSE BOX CLIP.

APPLICATION FILED MAY 16, 1911. RENEWED JAN. 4, 1912.

1,025,246. Patented May 7, 1912.

WITNESSES: W INVENTOR.

WMATTORNEY.

UNITED STATES PATENT OFFICE.

ROBERT C. COLE, OF WEST HARTFORD, OONNECTTC'OT, ASSIGNOR TO THE JOHNS-IPRATT COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF CON-NECTICUT.

FUSE-BLOCK CLIP.

Specification of Letters Patent.

Patented May '7, 1912.

Application filed May 16, 1911, Serial No. 627,518. Renewed January 4,1912. Serial No. 669,437.

To all 107mmv't may concern;

Be it known that I, ROBERT C. CoLE, a citizen of the United States,residing at West Hartford, county of Hartford, and State of Connecticut,have invented the liereinafter-described new and useful Improvements inFuse-Block Clips.

The invention relates to the structure of contact clips for fuses, andparticularly to the construction and mode of attachment of clips adaptedfor receiving the ferrule ter' minals of inclosed or cartridge fuses.

The invention involves a construction of clip, and associated means foranchoring and securing the same to the insulating base-block and forsecuring the line terminal to the clip, the object being to reduce thenumber and facilitate the assembly of the parts and to provide astructure Wherein the line terminal is directly attachable to the clipitself between the arms of the latter, and the clips are shaped to thebase in such manner that the seating thereof produces automatically aproper alinement of the two clips, and thereafter holds thei'n againsttendency or possibility of disalinement. In its preferred form the clipis anchored to the base by means of a rivet which is tubular andinternally threaded to receive the line terminal binding screw, thusobviating the necessity of special arrangements to this end andproviding a fusebloek which is specially compact, and shorter than anyheretofore produced, and wherein the electrical continuity between thefuse and the line is interrupted by only a single joint, which joint mayhave a desirably large contact area.

In the single sheet of drawings forming a part hereof, Figure 1 is aside elevation of a fuse-block embodying the invention, the severalparts thereof being assembled, and one end of the block being shown incentral longitudinal section. The figure also shows a standard form ofcartridge fuse adapted to be inserted in the fuse block clips. Fig. 2 isa cross-section of fuse-block of Fig. 1 on the line II-II; and Fig. 3 isa perspective view of one of the clips detached.

The clips at both ends of the base-block are or may be of exactly thesame structure and a description of one will therefore suffice for both.Each clip is formed of sheet metal struck up from a fiat blank andhaving a fiat central base plate marked 1, with two relatively yieldingarms 2 extending upwardly from the end portions of the base-plate. Eacharm is curved inwardly as shown at. 3 to form a stop shoulder for theentering fuse, and above the shoulder is formed to accommodate thegeneral exterior contour of the ferrule 4 of the inclosed fuse. Suchferrules are commonly cylindrical in shape, and the two spring arms aretherefore curved to approximately the arc of a circle of appropriatesize. For other shapes of ferrules they may be formed accordingly, itbeing desirable only that a sufficient space be left between the twoopposing arms to accommodate a screwdriver of ordinary size. Each arm isfurther provided with an inwardly projecting ear 2 serving to limitendwise movement of the fuse in the clip.

The base-plate of the clip is centrally perforated as shown at 5 in Fig.3, and 011 each side of the perforation is provided with two wings orlugs 6 which are adapted to engage with corresponding notches orrecesses formed in the upper surface of the insulating base-block 7. Thelugs 6 are depressed below the plane of the base-plate 1 so that thelatter may occupy ,a position slightly above the upper surface of thebase block while the lugs themselves are depressed below such plane intotheir recesses, in which position the fuse-clip at bothends will bemaintained in alinement with or parallel to the longitudinal axis of theblock, and each will be prevented against rotation thereon. As thusplaced, the clip is permanently secured to the block by means of aneyelet 8 which is passed through the perforation 5 and through acorresponding perforation 9 in the base-block, and

then upset over the margin of the perforation in the clip as indicatedin Fig. 1. The lower head of the rivet is embedded and protected by aplug 10 of shellac, while its upper end is shaped in such manner as toprovide a substantially flat surface on the base plate immediatelysurrounding the erforation therein. A clamping screw 11 1S threaded intotheinterior of the tubular eyelet and serves as the means for attach:ing the terminal lug 12 of the line wire 13 directly to the clip. Themode of assembly will be plain from a consideration of the drawings,wherein it will be observed that ample contact area is provided for theline terminal lug upon the clip, in a device having but a single screwto be manipulated, and the manner of the manipulation will be obviousfrom what has been said, While the fuse block itself need be of butslightly greater length than the fuse.

Claims.

1. A fuse-block comprising an insulating base perforated near itsextremities and provided with depressions in its upper surface adjacentthe perforations, in combination with fuse clips secured to the block bysecuring members passed through said perforations, and provided withlugs engaging said depressions to maintain the alinement of the clips,and a clamping member threaded to said "securing member whereby a lineterminal may be clamped in electrical contact with the clip.

2. A fuse block comprising an insulating base block having recesses inits upper surface, fuse clips provided with depressed integral lugsoccupying said recesses, an eyelet securing each lug to the base blockand a line terminal clamp screw screwed into the eyelet.

3. In a fuse block, a fuse clip formed of a base plate and twospring'arms adapted to embrace the side or ferrule contact surfaces ofan inclosed fuse, and provided with a central perforation between saidarms, in combination with one or more integral lugs formed on said clipto engage a base block, a securing member in the said perforation tosecure the clip to the base-block and a line terminal clamp screwscrewed into said securing member.

In testimony whereof, I have signed this specification in the presenceof two witnesses.

ROBERT C. COLE.

Witnesses:

HAZEL G. BRAINARD, DUNCAN C. HOOKER.

